Stair construction.



D.A.DALY. STAIR CONSTRUCTION. APPLICATION FILED MAR. 5, 1913.

Patented June 23,1914.

DANIEL A. DALY, or Naw Yoan, raopnors co., or NEW Yon-K, N.

N. Y., ASSIGNDB IO UNITED STATES METAL Y., A CORTORATION OFMASSACHUSETTS.

STATE CONSTRUCTION.

Specication ofLetters Patent. 4Patented June 23 19.14.

iApplication tiled, March 5, 1913. Serial No, 752,248,

To all whom it may concern Be it known that I, DANIELl A. DALY, a`citizen of the United States, and' a resident of the borough ofBrooklyn', city of New York, county of Kings, and State of New York,have invented certain new and useful Improvements in Stair Construction,of which the'followin is a specification. This invention re ates toimprovements in stair construction.

By the use of my invention I produce an exceedingly simple andAinexpensive construction whereby an effective non-slipping tread isprovided which is an integral part of the structure and a sanitary coveis formed between a tread of suitable filling material and a metallicriser;

Referring now to the accompanying drawings, in which similar referencecharacters designate corresponding parts throughout the several views,Figure 1 is a side elevation of a section of a stair embodying myinvention; and Fig. 2 is a planview of a stair tread embodying myinvention.

In the preferred embodiment. of myy invention I provide a series ofsections each formed of a single sheet of metal, each section comprisinga supporting tread, a riser having an outwardly bent portion contiguousto the supporting tread and adapted to provide a sanitary cove betweenthe riser and a suitable filling material, and a level indicator forsuch material, a nosing, a nonslipping tread ated metal having staggeredridges formed y cutting suitable apertures in said metal, said treadportion rojecting inwardly `from the nosing, spaced om the supportingtread of the preceding section and having a bearin ange contactingtherewith and a suitab e filling material filling the space between thenon-slipping trea portion and the supporting tread. i

Referring now-to these drawings 1 designates a section of stairconstruction formed of a single sheet of metal and comprising asupporting tread 2 which may have a flange at the lateral end thereof,riser 3, nosing 11, and a metallic non-slipping tread portion 5projecting'inwardly from the nosing and overhanging the supporting treadof the preceding section, and having a bearing contact therewith bymeans of a flan e 6. As shown, the supporting tread o one section bearsupon a ortion pomposed of corrusuitably spaced therefrom horizontal webportion 7 formed betweei l therser 3 and nosing 4 of the succeedingsection. e i ,f v'lhe overhaugin nonslipp-n ,tread p01- tion -5 ispreferab y formed o corrugated metaythe ridges 8 of which arestaggeredin re'l'atln to each other by having portions of alternateridges cut away as at 8", and these staggered ridges form, when soembedded in a suitable filling material 9 that the tops of 'such ridgeswill be flush with such material, a very eicient non-slipping tread.This filling material may be cement, lead, cariborundum, or othersuitable tread materia The riser 3, as illustrated, is providedcontiguous to the supporting tread with an outwardly bent portion 10which forms with the filling material thus preventingthe collectionofdust, etc., at this po1nt, and the apex of such outwardly extendingcove-forming portion pro-y vides an indicator to permit the workmentobring the filling material to the proper level.

It will be obvious that when the space between the supporting tread,metallic nonslipping tread portion and cove-portion is filled withcement, lead, carborundu'm, or other suitable material, an extremelyinexpensive non-slipping tread construction will be provided, whichnon-slipping tread will be an integral portion of the stairconstruction, and, furthermore, the forming froma single sheet ofnietalstair sections embody-v ing a, supporting-tread, riser, nosing and 9 asanitary 'cove 11 be- ,I 1 tween such riser and the filling material 9,'

non-slipping tread portion, will greatly reduce the cost of manufactureof the construction.

Having described my invention, I claim?.

1. In stair construction, a section formed of a single sheet of metal,comprisin a supporting tread, a riser, a nosing an a nonslipping treadportion projecting inwardly from the nosing.

2. In stair construction,l a section formed of a single sheet of metalcomprising a supporting tread, a riser, a nosing and a nonslippin treadportion projecting inwardly from t e nosing and formed of corrugatedmetal having staggered ridges.

3. In stair construction, a metallic supporting tread formed on onesection, a nosing and tion integrally formed on another section,I

a metallic non-slipping tread por- A the non-slipping tread portionbeing spaced from the said supporting tread and vided with apertures,anda suitable iilling material filling the space between the supportingtread and non-slipping tread p0rtion and embedding the major portion ofthe latter.

` 4. In stair construction, a section formed of a single sheet of metalcomprising a. supporting tread, 4aJ flange along the lateral edge ofsaid tread, a riser, non-slipping tread portion wardly rom the nosmg.

5. In stair construction, a. section formed a nosing, and a. projectingV1nof a single sheet of metal comprising a supportin tread, a flangealong the lateral edge of sai tread, a. riser, a nosing, 'and anonslippin tread portion projecting inwardly from tEe nosing and formedof corrugated metal having staggered ridges.

In witness whereof, I have signed my name to the foregoing specificationin the presence of two subscribing Witnesses.

DANIEL A. DALY.

Witnesses:

C. J. HALE, W. W. LEE.

